Refrigerator



FIG. 1 is a front perspective view of a refrigerator showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left-side view thereof;

FIG. 5 is a right-side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is an enlarged view of the encircled portion in FIG. 1.

The broken lines in the figures depict environmental subject matter and form no part of the claimed design. The dot-dash broken line encircling portions of the claimed design that are illustrated in enlargements form no part of the claimed design. 

CLAIM We claim the ornamental design for a refrigerator, as shown and described. 